Choosing the refrigerant

This elaboration is about refrigerants for vapour compression systems (for gas cycles: What are refrigerants?). The vapour compression process is dominating most areas of refrigeration, especially those with large production numbers of systems.

But before a refrigerant can be evaluated in terms of thermodynamics and efficiency in refrigeration applications, some other aspects need a closer look: material compatibility, availability of compatible lubricants, thermal and chemical stability and general availability of the fluid in sufficient amount at acceptable cost.